This book is worth reading and a laudable, painstaking effort. If you need a one-stop shop, whirlwind introduction to India and the world, this book is it. It is extensive, attempting to cover all aspects of Indian foreign policy and all of India's relations in the world (to various extents). It is informative, but by virtue of its scope, it lacks depth. But that is alright, because it does not profess to have depth - it is after all an attempt to cover all bases. Unfortunately, and this may just be a personal opinion, the lack of depth, the lack of a singular thread of argument does not make it a necessarily compelling read. I repeat that it is informative - but it is not richly detailed. The book addresses this with its references and recommended readings section. Read the relevant chapters and then proceed to the corresponding recommended reads, and you would have then made the most of this book. In sum, it is not the most attractive book, but it is necessary reading and a laudable attempt.
The book would have benefitted from two efforts - one, an attempt to state and restate an argument throughout the book, which would've pulled the book together and made it far more readable. A very readily available theme to highlight throughout the book would be the basic tenets of Indian foreign policy which India has followed throughout its engagements since independence (if the author feels it is the case). And to use that framing. The book is descriptive and prescriptive; it is not necessarily persuasive and argumentative.
Second, the manuscript would've benefited from a thorough line-by-line, word-by-word, end-to-end read prior to publication. I found several typos, grammatical errors, and sometimes typos that lent themselves to factual inaccuracies. There were multiple instances in every chapter. This was unfortunately quite interruptive - because I would be deep in reading this wonderful book, only to find these errors pulling me out from time to time.
I only have this expectation because the author's reputation precedes them.